<html>
  <head>
    <title></title>
  </head>
  <body>
    <form action="http://127.0.0.1:9090/login&username=vine" method="post">
      用户名: <input type="text" name="username" />
      密码: <input type="password" name="password" />
      <input type="submit" value="登录"/>
    </form> 
  </body>
</html>